When setting in Jenkins, into Job->Configuration->SourceCodeManagement->Git->RepositoryURL the following line: ssh://git@myserver.mydomain:port.myrepository.git

I have following error displayed below immediatly in red by the Jenkins Git Plugin:

Failed to connect to repository : Error performing command: git ls-remote -h ssh://git@myserver.mydomain:port.myrepository.git HEAD

The git.exe ls-remote <repo url> command also works correctly from git bash of the node and Git is in the path and its path is specified into tools in the node configuration; besides my permissions are set correctly and the clone of this repository works correctly so, it should be a bug with the Git Plugin.